I know that IAD's 4th runway (1L-19R) will be opening this year, but I was wondering whether anyone knows if the proposed 5th runway (30L-12R) will operate in the same manner as the current 12-30 runway does? Meaning, will it host landing operations ONLY on 12 and departing operations ONLY on 30?

Currently, the airport does allow arrivals on runway 30 when the winds are so strong as to make a crosswind landing on runway 1R hazardous and I'm also reasonably certain that there are no runway 12 departures allowed because of the impact on neighborhoods in Chantilly.

Is there anyone out there with knowledge of how they intend to utilize this proposed 5th runway?